A southwesterly airflow lies over New Zealand today, a cold front moves onto the lower South Island this afternoon then pushes northwards overnight.

Northland, Auckland, Waikato & Bay Of Plenty
Cloudy areas and occasional showers, drying out in the afternoon for Bay Of Plenty and Waikato then further north in the evening. Fresh southwesterlies.
Highs: 17-23

Western North Island (including Central North Island)
Partly cloudy with the odd shower, mainly in the morning. Southwesterly winds, perhaps tending more westerly in the afternoon south of Taranaki.
Highs: 14-19

Eastern North Island
Early showers ease becoming quite isolated, sun breaks through at times. Fresh southwesterlies ease dying out overnight.
Highs: 18-22

Wellington
Partly cloudy with the risk of a shower, southerly winds die out in the evening.
Highs: 15-18

Marlborough & Nelson
Partly cloudy, chance of an isolated shower in the afternoon (mainly for Marlborough) as light southwesterlies tend onshore.
Highs: 18-21

Canterbury
Chance of a shower in the morning then sunny spells develop, southwesterlies die away tending east to northeast in the afternoon. Late afternoon showers develop for South Canterbury turning to rain in the evening, rain spreads northwards overnight.
Highs: 16-20

West Coast
Cloudy areas and occasional showers, southwesterly winds.
Highs: 16-18

Southland & Otago
Cloudy areas and a few showers for Southland, Otago has morning sun then showers develop in the afternoon. North Otago may have some evening rain. Westerlies tend more southwest during the afternoon, fresh about the coast.
Highs: 14-20